1367891057 has 4 divisors (see below), whose sum is σ = 1473113460. Its totient is φ = 1262668656.

The previous prime is 1367891051. The next prime is 1367891069. The reversal of 1367891057 is 7501987631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7501987631 = 31 ⋅241999601.

It can be written as a sum of positive squares in 2 ways, for example, as 409617121 + 958273936 = 20239^2 + 30956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1367891057 - 2⁸ = 1367890801 is a prime.

It is a super-2 number, since 2×1367891057² = 3742251887641154498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1367891051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52611182 + ... + 52611207.

It is an arithmetic number, because the mean of its divisors is an integer number (368278365).

Almost surely, 2^1367891057 is an apocalyptic number.

It is an amenable number.

1367891057 is a deficient number, since it is larger than the sum of its proper divisors (105222403).

1367891057 is a wasteful number, since it uses less digits than its factorization.

1367891057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105222402.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 1367891057 is about 36985.0112478015. The cubic root of 1367891057 is about 1110.0703515727.

The spelling of 1367891057 in words is "one billion, three hundred sixty-seven million, eight hundred ninety-one thousand, fifty-seven".